| 摘要 |
PROBLEM TO BE SOLVED: To provide a focus state detector capable of quickly detecting the focus state in simple constitution without using a wobbling method by generating object light for focus state detection in the color resolving optical system of a camera main body, picking up the image of the object light by an imaging device for the focus state detection and detecting the focus state on the basis of the image picked up by a plurality of the image pickup elements for the focus state detection of different optical path lengths. SOLUTION: Among the object light made incident on the color resolving optical system, green light is transmitted through a blue resolving prism PB and a red resolving prism PR and is divided into reflected light and transmitted light on a half mirror surface 42 which is the contact surface of a first green resolving prism PG1 and a second green resolving prism PG2. The reflected light is emitted as the object light for the focus state detection and is made incident on the imaging device A for the focus state detection. |
